My playgroup really likes the lunatic, but wished it was more viable in large minion counts. Si I ran with the idea of making a script where lunactics can be have the worst/best time!
The only classic interaction I decided against including is the mastermind gaslighting the real demon as if they were the lunatic to get a MM win, because my group doesn't like mastermind.
Other than that, go ham submitting characters that would fit the concept well, pointing out what you like and what you like less about the current version.
Cheers!